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Oxidized LDL and expression of monocyte adhesion molecules
1Department of Geriatric Medicine, Graduate School of Medicine, Kyoto University, Japan. tkita@kuhp.kyoto-u.ac.jp
Diabetes Research and Clinical Practice
|December 10, 1999
Summary
Lysophosphatidylcholine (lyso-PC), found in oxidized low-density lipoprotein (LDL), promotes early atherosclerosis by increasing monocyte and T lymphocyte adhesion. The novel oxidized LDL receptor, LOX-1, is crucial in this process.
Area of Science:
- Cardiovascular Biology
- Atherosclerosis Research
- Lipid Metabolism
Background:
- Atherogenesis involves monocyte/macrophage and T lymphocyte accumulation in arterial intima.
- Lysophosphatidylcholine (lyso-PC), a component of atherogenic lipoproteins like oxidized LDL, is elevated in specific patient groups.
- Diabetic and type III hyperlipidemic patients show increased lyso-PC in lipoproteins.
Purpose of the Study:
- To investigate the role of lysophosphatidylcholine (lyso-PC) in atherogenesis.
- To highlight the significance of the interaction between oxidized low-density lipoprotein (LDL) and its receptor, LOX-1, in early atherogenesis.
Main Methods:
- The study focuses on summarizing existing findings regarding lyso-PC and LOX-1.
- Analysis of the upregulation of adhesion molecules and growth factors by lyso-PC.
- Identification and characterization of the novel oxidized LDL receptor, LOX-1.
Main Results:
- Lysophosphatidylcholine (lyso-PC) upregulates adhesion molecules essential for monocyte and T lymphocyte recruitment.
- Lyso-PC also upregulates growth factors, including heparin-binding epidermal growth factor-like growth factor and PDGF-A and B chains.
- The novel receptor LOX-1 mediates the interaction of oxidized LDL, a key factor in early atherogenesis.
Conclusions:
- The interaction between oxidized LDL and its receptor LOX-1 is critical in the early stages of atherogenesis.
- Lysophosphatidylcholine (lyso-PC) plays a significant role in promoting inflammatory cell adhesion and growth factor expression during atherogenesis.